Step 2: Upright posts for top level.

Step 3: Finished top and fun stuff added.

I used 2x4's and 1x2 strips to make top railings. I wanted a certain level of security up there since a 2.5 yo would be using this. After looking at t...

This started as an idea to reuse a queen sized mattress which still had some life in it. The project morphed from a patio bed to a tower fort for my kids. The first step was to make a platform for the mattress. Second was to make the top level. Added on to the top level are safety rails, a trap door, a climbing wall, a whiteboard, rope ladder, swing rings, pulley baskets and safety padding. The lumber is regular pine.

I'm a novice woodworker and my tools are modest. Also I am limited in how much time I can dedicate to ideas like this one that I come up with. So , speed and costs are important. But , I am doing this for the experience and try to get out of the building process what I can.

I built this for a patio because the weather conditions of South Florida can make a mess of wood outside after only a few years. Also , because of the local mosquito problem. This was a trade-off to making a real tree-house or play fort outside.

The photos are pretty self explanatory as to how it was put together. I am posting this because it may give others an idea of how to make a playhouse/fort for their kids . One that isn't outside so the kids can use/play with it more often because it is more accessible.

Step 1: Mattress base assembly.

Just a big frame screwed together.

Step 2: Upright posts for top level.

The pictures give an idea of what I did. Basically, I made a big cube. I just kept adding wood spans and screwing 2x4 's until it was stable and the flex was minimal. It turned out kinda like a big bunk bed.